Studies On The Accumulation Mechanism And Effect Of Fertilization Of Protein Quality Of Different Kinds Gluten Wheat Varieties

Two gluten wheat varieties were planted in the field experiments from 2001 to 2003,to study the accumulation mechanism and metabolization characteristics of the grain protein,the principle of N assimilation,accumulation and distribution,and the assimilation characteristics,and the effects of fertilizer on yield and quality.Two levels of irrigation(water and drought) was treated in 2001~2002,watered treatment was irrigated one time at winter-growing,jointing stage and anther connective stage,droughted treatment was not irrigated during the period of life. There were abundant hygrometric,did not irregated during the period of life in 2002~2003,The main results are as follows:1.The effect of different fertilizer application on grain protein content are different.According to the strong gluten Zhengzhou9023,the nitrogen fertilizer application can improve the grain protein content of the strong gluten wheat Zhengzhou9023.But there was negative efficiency only the application of P and K ,however, the combined application of Nand P can improve significantly the grain protein content,even surpassing the only N application.But even though the combined application of N and K decrease the grain protein content,the reason is perhaps that the high potassium in soil. According to the weak gluten wheat Yumai50 there was positive efficiency only the application N and K,but the only P application was negative efficiency,the combined application of N and K or P can improve the grain protein content.The effect of the same fertilizer application on the grain protein content of different gluten varieties is different.The grain protein content of Zhengzhou9023 is higher than Yumai50 in N and NP treatment at filling stage, the grain protein content increase by 4.87% and 5.05% compared with the control of Zhengzhou9023,and 4.72% and 4.26% compared the control of Yumai50.The grain protein content of Yumai50 is higher than the Zhengzhou9023 before 30 days after anthesis in CK and P treatment,but lower in 36 days after anthesis.The grain protein content of Zhengzhou9023 is higher than the Yumai50 before 30 days after anthesis in PK and NPK treatment,but lower at harvesting. The grain protein content of Yumai50 is higher than the Zhengzhou9023 30~36 days after anthesis in K and NK.So the effect of fertilize in Zhengzhou9023 is higher than in Yumai50,especially from late milking to harvesting stage.K treatment decrease the grain protein content of Zhengzhou9023,so the grain protein content of Zhengzhou9023 is lower.2.The total free amino acid content gradually reduced among all the organs of the plants of both cultivars at filling stage.There were some efficiency between the fertilizer application and the free amino acid content of vegetative organs.The application of N can obviously improve the the free amino acid content of vegetative organs at milking stage. The combined application of N and Kcan increase the free amino acid content of leaves and hull+rachis. The combined application of N and P can increase the free amino acid content of culm and sheath.The application of N and the combined application of N and P can increase the free amino acid content of grain at milking stage of both varieties. The application of K the free amino acid content of grain at late milking to harvesting of Yumai50.The result also showed that the effect of different fertilizing methods on the content of protein compontents.Tthe combined application of N and K can increase obviously grain gliadin and glutenin content and processing quality.3.The GMP content decrease gradually in late grain filling process in Zhengzhou9023,but it increase gradually in Yumai50. The GMP content is higher in Yumai50 than that in Zhengzhou9023 in manuality.In Zhengzhou9023 N treatment,P treatment,K treatment,NP treatment and NPK treatment put off the time of the GMP contents decreasing. In N treatment, NK treatment and NPK treatment the GMP content is higher than that in CK treatment.The turn of GMP content in all treatment is Nï¹¥Kï¹¥P,NKï¹¥NPKï¹¥NKï¹¥PK. In Yumai50,ex...